I'm flummoxed to see so large a population of 4 and 5 star reviews. I have the audio book and I have to say the story seems written by about a 16-year-old for an 8-year-old audience. The storytelling and the dialog between characters is sophomoric; the characters are mere cutouts with no texture, rhyme or reason.
I finished about a third of the story and don't plan to listen to it further. Boring and simplistic, not literature at all.
And, to be clear, this is a work of fiction. Pure and simple. It is fiction. “Based in a true story” perhaps, but since the author invented events and dialogue we will never know how much of it is fact-based.